Preparation of sodium alginate gel microspheres catalysts and its high catalytic performance for treatment of ciprofloxacin wastewater

The discharge of the antibiotic wastewater has increased dramatically in our country with the development of medical science and wide application of antibiotic,resulting in serious harm to human body and ecological environment.In this work,ciprofloxacin(CIP)was selected as one of typical antibiotics and heterogeneous Fenton-like catalysts were prepared for the treatment of ciprofloxacin wastewater.The sodium alginate(SA)gel microspheres catalysts were prepared by polymerization method using double metal ions of Fe^(3+)and Mn^(2+)as cross-linking agents.Preparation conditions such as metal ions concentration,mass fraction of SA,polymerization temperature and dual-metal ions as crosslinking agent were optimized.Moreover,the effects of operating conditions such as initial concentration of CIP,pH value and catalyst dosage on CIP removal were studied.The kinetic equation showed that the effect of the initial concentration of CIP on the degradation rate was in line with second-order kinetics,and the effects of catalyst dosage and pH value on the degradation rate of CIP were in line with first-order kinetics.The SA gel microspheres catalysts prepared by dual-metal ions exhibited a high CIP removal and showed a good reusability after six recycles.The SA gel microspheres catalysts with an easy recovery performance provided an economical and efficient method for the removal of antibiotics in the future.

Molecular cloning and expression analysis of FTZ-F1 in the GIFT tilapia,Oreochromis niloticus

The FTZ-F1 genes encode orphan receptors of the nuclear receptor superfamily and in mammals have been found to play important roles in the proper development of the adrenal-gonadal axis and sex-determination.We isolated the homologue of FTZ-F1 in genetically improved farmed tilapia(gfFTZ-F1).The full-length cDNA was isolated from the ovary,which included an open reading frame encoding a predicted protein of 486 amino acids.Sequence,tissue distribution and phylogenic analysis of the FTZ-F1 showed that the gfFTZ-F1 belonged to SF-1/Ad4BP group and that gfFTZ-F1 transcripts were only expressed in the gonads and kidney but not in other tissues.Likewise our data suggests that the gfFTZ-F1 gene may share similar functions with other fish and mammalian counterparts,though further study is needed to make any definitive conclusions.

Molecular cloning and expression analysis of FTZ-F1 in the GIFT tilapia,Oreochromis niloticus

The FTZ-F1 genes encode orphan receptors of the nuclear receptor superfamily and in mammals have been found to play important roles in the proper development of the adrenal-gonadal axis and sex-determination.We isolated the homologue of FTZ-F1 in genetically improved farmed tilapia(gfFTZ-F1).The full-length cDNA was isolated from the ovary,which included an open reading frame encoding a predicted protein of 486 amino acids.Sequence,tissue distribution and phylogenic analysis of the FTZ-F1 showed that the gfFTZ-F1 belonged to SF-1/Ad4BP group and that gfFTZ-F1 transcripts were only expressed in the gonads and kidney but not in other tissues.Likewise our data suggests that the gfFTZ-F1 gene may share similar functions with other fish and mammalian counterparts,though further study is needed to make any definitive conclusions.